EF0 tornado, Four Corners to Sandhill, Tennessee, March 1, 2017

1. EF065 to 85 mphthis tornado

   Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

2. EF186 to 110 mph

   Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

3. EF2111 to 135 mph

   Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

4. EF3136 to 165 mph

   Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

5. EF4166 to 200 mph

   Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

6. EF5over 200 mph

   Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

7. Unrated

   The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

Rating

EF0

Date

March 1, 2017

Touchdown

7:17 AM CST (13:17 UTC)

Lifted

7:20 AM CST (13:20 UTC)

On the ground

3 minutes

Path length

3.1 miles (5.1 km)

Path width

100 yards (91 m)

Deaths

0

Injuries

0

Property damage

$55,000

Counties

Davidson and Rutherford counties

Touchdown point

36.040, -86.597

Lift-off point

36.062, -86.549

Record number

1703010717-01

96 damage points were recorded along this path by NWS OHX, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 105 mph.

• Extensive damage to docks, boats, and shelters at Four Corners marina.
• Snapped pine trees. Snapped part laying due north.
• Trees snapped at same level on South Berrys Chapel Road
• Numerous tree branches snapped off and outbuildings destroyed.

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

The most damaging severe weather outbreak in Middle Tennessee since the December 23, 2015 Tornado Outbreak struck during the morning hours on March 1, 2017. A line of strong to severe thunderstorms with embedded circulations, known as a Quasi-Linear Convective System (or QLCS), moved rapidly across Middle Tennessee at 60-70 mph from west to east between 6 AM and 10 AM CST. Additional severe thunderstorms developed later in the morning and affected areas of southern Middle Tennessee from the late morning into the early afternoon hours. Widespread damaging winds were reported in nearly every county along and north of I-40 across Middle Tennessee, with winds estimated up to 90 mph in some areas. These intense downburst winds caused 3 injuries - two in Clarksville when a tree fell on a mobile home, and one in Lavergne when a tractor trailer flipped over. In addition to the damaging winds, 7 confirmed tornadoes also touched down from the Nashville metro area eastward to the Upper Cumberland, damaging hundreds of homes and businesses. Several reports of large hail were also received in parts of southern Middle Tennessee.

An EF-0 tornado touched down in extreme southeast Davidson County near Murfreesboro Pike and Old Hickory Blvd around 717am CST. The tornado caused sporadic damage mainly to trees as it raced to the northeast, although a few homes suffered minor roof damage on Lavergne Couchville Pike, Pepperwood Drive, and Chutney Drive. It then hit the Four Corners Marina around 719am CST and caused extensive damage to docks, boats and shelters. The tornado crossed the Hurricane Creek inlet of Percy Priest Lake into Rutherford County, then blew down a few trees and deposited debris from the marina on the eastern shore of the lake. The tornado then lifted near the northern end of Stones River Road.

An EF-0 tornado touched down in extreme southeast Davidson County near Murfreesboro Pike and Old Hickory Blvd around 717am CST. It cause sporadic damage mainly to trees as it raced to the northeast, although a few homes suffered minor roof damage on Lavergne Couchville Pike, Pepperwood Drive, and Chutney Drive. It then hit the Four Corners Marina around 719am CST and caused extensive damage to docks, boats and shelters. The tornado crossed the Hurricane Creek inlet of Percy Priest Lake into Rutherford County, then blew down a few trees and deposited debris from the marina on the eastern shore of the lake. The tornado then lifted near the northern end of Stones River Road.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

14 minutes of warning. NWS OHX issued a tornado warning for this county at 13:03 UTC, 14 minutes before the tornado touched down, in force until 13:30 UTC.

The county was under a tornado watch, issued at 10:57 UTC and running to 15:17 UTC.

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The Storm Prediction Center had this point in a Moderate Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 12:51 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Smyrna (MQY), 7 km from the path, in the two hours either side.

From the Iowa Environmental Mesonet's archive of airport observations.

The Nashville radar (KOHX), 22 km away, was scanning. The volume nearest the touchdown began at 13:15 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

Local storm reports within 60 km of the path, in the three hours either side.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

The live radar over the trackEvery 2017 tornado in TennesseeEvery tornado in Tennessee since 1950Warnings in force in Tennessee nowThe forecast where you are

38 more were confirmed in the United States that day.

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.